/*
 * Copyright 2020-2030 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.wwl.stack;

/**
 * @author Neil Wang
 * @version 1.0.0
 * @date 2021/6/10 2:58 下午
 */
public class LinkedListStark<T> implements Stack<T> {
    private final LinkedList<T> list;

    public LinkedListStark() {
        this.list = new LinkedList<>();
    }

    @Override
    public int getSize() {
        return list.size();
    }

    @Override
    public boolean isEmpty() {
        return list.empty();
    }

    @Override
    public T pop() {
        return list.removeFirst();
    }

    @Override
    public void push(T t) {
        list.addFirst(t);
    }

    @Override
    public T peek() {
        return list.getFirst();
    }

    @Override
    public String toString() {
        return "Stack: TOP->" + list;
    }
}
